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李  云1，  張同億1，  何曉洪2，  王利群1
(1 中國(guó)中元國(guó)際工程公司，北京100089；2 北京清華安地建筑設(shè)計(jì)顧問(wèn)有限責(zé)任公司，北京100084)

[摘要] 北京國(guó)際花卉物流港罩棚是前端有較大仰角的馬鞍形開(kāi)敞式覆膜結(jié)構(gòu)，由屋脊桁架、徑向倒三角桁架、周邊環(huán)梁和斜柱組成骨架，上表面采用PTFE張拉膜材。本文結(jié)合具體的結(jié)構(gòu)設(shè)計(jì)，介紹了結(jié)構(gòu)風(fēng)荷載、雪荷載取值特點(diǎn)，給出結(jié)構(gòu)靜力、動(dòng)力分析及屈曲分析結(jié)果，研究了支撐柱計(jì)算長(zhǎng)度系數(shù)取值及節(jié)點(diǎn)受力情況，可供類(lèi)似工程設(shè)計(jì)參考。
[關(guān)鍵詞] 罩棚；風(fēng)洞試驗(yàn)；靜力、動(dòng)力分析；屈曲分析；計(jì)算長(zhǎng)度系數(shù)

    Structure Design of the Canopy in Trade Center of the International Flower Expo in Beijing
    Li Yun¹, Zhang Tongyi¹, He Xiaohong², Wang Liqun²
    (1China IPPR  Intemational  Engineering  Corporation, Beijing  100089, China; 2 Beijing Tsinghua-Andi Architects Consultants Ltd,Beijing 100084, China)

Abstract: The canopy in trade center of the international flower expo in Beijing is designed as saddle opening style with a big angle of elevation. The main supporting structure is made u Pof roof truss, triangle truss, beams and columns and PTFE material is used as membrane. The wind and snow load is introduced in detail. The static and dynamic analysis, and the buckling analysis of the structure are analyzed. The effective lengths of the columns and the node design are introduced. The experience can be referred by the similar engineering.
Keywords: canopy; wind tunnel test; static and dynamic analysis; buckling analysis; effective length